Water-injector for internal-combustion engines.



N0.89l,63 8'. PATENTED JUNE 23, 1908.

I A. G. SOHOLES &- G. GIBSON. r

WATER INJECTOR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION iILED JAN;1B. 1908.

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ALFRED GEORGE SOHOLES, OF ILFOR D, AND GEORGE GIBSON, OF WESTMINSTER,

ENGLAND.

WATER- INJECTOR FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented June 23, 1908.

Application filed. January 18, 1908. Serial No. 411,539.

To all whom it may concern:

Be it known that we, ALFRED GEORGE SCHOLES, engineer, a subject of theKing of Great Britain and Ireland, residin at 41 Gordon road, Ilford, inthe county 0 Essex, England, and GEORGE GrBsoN, engineer, a subject ofthe King-of Great Britain and Irelan residing at 25 New street, in thecity and county of Westminster, England, have invented a new and usefulImprovement in Water-Injectors for Internal-Combustion Engines, of whichthe following is a full and com lete specification.

. Tl iis invention relates to that type of water injector for internalcombustion engines consisting of a small direct-acting pump the pistonof which receives motion for its Working stroke from the explosiveeffort in the working cylinder of the engine so that the water isinjected into the cylinder immediately after the commencement of thework- ,ing stroke of the engine, and it consists essentially in makingthe delivery port in the cylinder of the ump as near to its open end aspossible so t at said port iscloser by the iston operating the pump whensaid piston s at the end of its return stroke, the object being toprevent the waterreniaining in the delivery port or assage being suckedinto the working cylinder of the engine during the suction stroke of thepiston thereof which is an inherent fault in water injectors of thistype, which fault is generally intensified by reason of the length ofthe delivery port or passage. It has been suggested that this defect canbe remedied by the use of a nonreturn valve at the end of the deliveryport or assage but the heat is so intense that suc 1 a valve will notwork reliably in such a position.

The invention also consists in certain de tails of constructionhereinafter specified which have for their objects enabling thedirection in which the water is injected into the cylinder to be variedas desired, to simliiy the construction, and to increase the its oi theworking parts more particularly the spring employed for effecting thereturn stroke of the working piston.

In the accompanying drawing, l ignrc l is a view in sectional elevation,and Fig. 2 is a view in plan with top of casing removed.

In both views similar parts are marked with like letters of reference.

The apparatus consists essentially of a cylinder a, open at one end, apiston b working in said cylinder, an extension b of said piston forminga ram which works in a second cylinder 0, a spring (1 acting on thepiston b to effect its return stroke, an inlet port or passage e leadinginto the head of the cylinder 0 fitted with a non-return valve e, anoutlet port or assage 1' leading from said cylinder 0 fitter with anon-return valve f, the said outlet terminating in the cylinder 1 at ornear the open end thereof in such a position that it is closed by theiston b when it is at the end of its return stro e at the open end ofsaid cylinder.

In the preferred construction which is that illustrated in theaccompanying drawing the spring (I is located outside the cylinders inorder that the high temperature of the iston b may not be imparted to itin order t at its temper may not be impaired. The spring acts onthe-'pistonb through an extension b of the ram b (which projects throughthe head of the cylinder 0) through a collar g) screwed or. otherwisefixed on said extension and operates against the up er end of a cap l1screwed or otherwise fixer to the cylinder -hcad. 'lhc cylinders and thevalve boxes are preferably formed in one iecc as shown, a suitablepacking c and pac ring ring w being em )loycd between the two cylindersand a suitalile packing r and packing ring 10 being employed where theextension If )asscs through thc cylinder head. The valve ioxes arepreferably inclosed in a casing It which is r I constructed and arrangedto operate as a water jacket in which construction the inlet port 0opens into said chamber and said chamber is provided with an inlet e forthe supply of water. The o on end of the cylinder (1 is partially closerby a ring Z which operates as a stop for the piston to bear against. Thestrength of the spring d issuch that the pressure on the piston 6 duringthe coinprcssion stroke of thc cuginc will not lift said piston and willthcrcfore not cause the injector to function. In the cylinder 0 is asmall hole a. the function of which is to preconvenient place for theworking K the combustion chamber The cylinder a is threaded externallyor otherwise ada ted to be fixed in the wall of the cylinder 0 the motorso that it is open to thereof. In an engine such as is used in motorroad vehicles a insertion of the a paratus would be one of the holesabove the valves which are usually closed by screw plugs. I

To enable the jet of water produced by the a paratus to be directed inany direction- W 'ch is especially useful in applying the apparatus tothe engines of motor road vehiclesthe outlet of the delivery port orpassage f leads into an annular channel at the open end, of the cylinder11. This channel is conveniently formed by a ring n having a groove n inone of its faces being fitted in a recess in the 0 en end of thecylinder (1 and kept in place t erein by the ring Z. The inner edge ofthe ring a is provided with one or more holes 0 communicating with theannular'groove or channel a so that by rotatin the ring a the said holeor holes maybe place in any desired position in the circumference of,the cylindere.

What we claim, and desire to secure by Letters Patent is 1. An apparatusfor injecting water into the cylinder of an internal combustion engineoperated by the force of the explosion in said cylinder, comprising acylinder open to the cylinder of the engine, a piston working in saidcylinder, a small force pump thcram of which is operated by said piston,suction and deliver ports for the pump fitted with non-rcturn valves,the outlet of the delivery port terminating in the cylinder of theapparatus at or'near the open end thereof so that said outlet is closedby the piston of the apparatus when said piston is at the end. of itsstroke at the open end 01 the said cylinder, as set forth.

2. In an ap aratus for injecting water into the cylinder 0 anin'tcrnalcombustion engine, the combination of an open-ended cylinder inconnection with the cylinder of the motor, a piston working in saidcylinder, a spring pressing the piston towards the open end of saidcylinder the strength of the spring being such that the piston will notbe moved during the compression stroke of the engine, a rain operated bysaid piston, a pump cylinder in which said ram works, an inlet orsuction port or passage for said pump cylinder, a non-return valve insaid suction port or passage, a delivery port or passage leading fromthe pump cylinder into the cylinder of the apparatus in'sueh a'positionthat the outlet 0 said port or iassage is closed byv the pistonwhenit'is at the end of its return stroke in said cylinder, and anon-return valve in said delivery port or'passage, as set forth.

3. In an ap aratus for injecting water into the cylinder of an internalcombustion engine, the combination of an men-ended cylinder inconnection with the cylinder of the motor, a piston working in saidcylinder, a spring operating to press the piston towards the open end ofthe cylinder and retain it in said position at all times except duringthe workmg stroke of the engine, an annular ring in the open end of thecylinder for retaining the piston in said cylinder, a ram operated bysaid piston, a pump cylinder in which said ram works, an inlet orsuction port or passage for said pump cylinder, a non-return valve insaid suction port or passage, a delivery port or passage leading fromthe pump cylinder into the cylinder of the apparatus in such a positionthat the outlet of said port or passage is closed by the piston when itis at the end of its return stroke in said cylinder, and a non-returnvalve in said delivery port or passage, as set forth.

4. In an ap )aratus for injecting water into the cylinder 0 an internalcombustion engine, thee" ombination of an o en-ended cylinder inconnection with the cy inder of the motor, a piston working in saidcylinder, a spring operating to press the piston towards the open end ofthe cylinder and retain it in said position at all times except duringthe workmg stroke of the engine, the said spring being located outsidethe cylinders, an annular ring in the open end of the cylinder forretaining the piston in said cylinder, a ram operated by said piston, apump cylinder in which said ram works, packing between the twocylinders, an inlet or suction port or passage for said pump cylinder, anonreturn valve in said suction port or passage, a delivery port orpassage leading from the pump cylinder into the cylinder of theapparatus in such a position that the outlet of said port or passage isclosed by the piston when it is at the end of its return stroke in saidcylinder,

and a non-return valve in said delivery port or passage,-as set forth.

5. in an apparatus i or injecting water into the cylinder ol an internalcombustion engine, the combination of an o en-ended cylinder inconnection with the ey inder oi the motor, a piston working in saidcylinder, a spring located outside said cylinders and. operating topress the piston towards the open end of cylinder and retain it in saidposition at all times except during the working stroke of the engine, anannular ring in the open end of the cylinder for retaining the plston insaid cylinder, a ram operated by said piston, a pump cylinder in whichsaid ram works, an inlet or suction port or passage for said pumpcylinder, a non-return"valve in said suction port or passage, a deliveryport or passage leading from the pump cylinder irrto the cylinder of theapparatus in such a signed our names in the presence of two subpositionthat the outlet of said port or passcribing Witnesses. sage is closed bythe piston when it is at the ALFRED GEORGE SCHGLES. end of 1ts returnstroke 111 sald cylinder a 5 non-return valve in said delivery port orGEORGE GIBSON passage, and a Water jacket surrounding the VJitnesses:cylinders and valve boxes, as set forth. A. MILLWARD FLAOK,

In testimony whereof We have hereunto G. V. SYMEs.

